Naming & Formulas
Name the compound: CaCl₂
Calcium Chloride
Balance: __ K + __ Br₂ → __ KBr
2,1,2
What phase change turns a liquid into a gas?
evaporation or boiling
What property describes how easily a substance can be hammered into thin sheets?
malleability
Who first proposed the idea of the atom?
Democritus
What is the formula for magnesium hydroxide?
Mg(OH)₂
Balance: __ HCl + __ Ca(OH)₂ → __ CaCl₂ + __ H₂O
2,1,1,2
What phase change turns a solid directly into a gas?
Sublimation
What category of element is brittle and a poor conductor?
Non-metal
What scientist discovered the electron using the cathode ray tube?
JJ Thomson
Name the covalent compound: SO₃
Sulfur Trioxide
Balance: __ Pb(NO₃)₂ + __ KI → __ PbI₂ + __ KNO₃
1,2,1,2
Boyle’s Law relates which two properties of gases?
Which element category shares traits of both metals and non-metals?
metalloids
Which scientist proposed the nuclear model with a dense center?
Ernest Rutherford
What is the formula for diphosphorus pentachloride?
P₂Cl₅
Balance: __ C₂H₆ + __ O₂ → __ CO₂ + __ H₂O
2,7,4,6
What happens to gas particles when temperature increases?
They move faster and spread further apart
What group is known for having 1 valence electron and reacting violently with water?
Alkali metals
What did John Dalton believe about atoms?
They were solid, indivisible particles that made up matter
Name the compound NH₄NO₃
Ammonium Nitrate
Balance: __ Al + __ HCl → __ AlCl₃ + __ H₂
2,6,2,3
According to Charles’ Law, what happens to volume if temperature increases (and pressure stays constant)?
volume increases
What property of transition metals makes them useful for tools and wiring?
They are strong and good conductors
What analogy describes Rutherford’s model of the atom?
Like a solar system, with electrons orbiting a nucleus